Aerobic exerciser



FIG. 1 is a perspective view of an aerobic exerciser showing my newdesign;

FIG. 2 is a left side elevational view thereof, the right side viewbeing a mirror image;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for an aerobic exerciser, as shown and described.